Kalm's St. Johnswort  Picture

A compact little shrub with large, beautiful, bright yellow flowers from June-August which are immensely popular with bumble bees. Seed capsules are cone-shaped, typical of St. Johnsworts, and fade from yellow-green to brown as they ripen going into the fall. Short, stiff, dark-green leaves resemble rosemary, remaining semi-evergreen during winter months. Prefers rich, sandy loams, but is tolerant of salt, drought, sand, and poor soil, and can even be planted in rock gardens. No serious pests or diseases, can also be used as a rain garden plant.

Average To Wet
Full Sun
2-3 feet tall
Plant Hardiness Zones: 3a-6b
Woody Shrub

Native Range: NY, OH, MI, IN, IL, WI, and MN. Native in Canada in ON and QC. Rare in OH, IN, IL, and MN. Considered extirpated in NY.

Germination - Easy: Cold Stratify 8 weeks, surface sow.

Kalm's St. Johnswort quart pot $14.75 (Temporarily Sold Out*)

Kalm's St. Johnswort Seed Packet $4.00

*We normally carry this item but are temporarily sold out. We expect to have it available again as soon as our plants in production reach sufficient size/maturity or we harvest more seed. In some cases, plants may be recovering from caterpillar damage (Monarchs love our Milkweed), wind or hail damage, rampaging woodchucks, downed trees, or other natural issues. We are constantly updating our web site so please check back again.

Review or Finalize Your Order